I almost finished writing a tutorial (http://wikifab.org/wiki/Arithmom%C3%A8tre_(machine_%C3%A0_calculer_m%C3%A9canique) and I uploaded files. But one file was wrong, so I deleted it and tried to load the corrected file, with the same name. But I got errors. I tried changing the name, but it recognises it's the same file and I couln't upload it. Of course, it's the most important file of my tutorial